Advanced GaAs power amplifier architecture linearized with a post-distortion method

S. Ben Smida; K. A. Morris; J. C. Clifton; A. Lawrenson

doi:10.1109/MWSYM.2014.6848428

Advanced GaAs power amplifier architecture linearized with a post-distortion method

S. Ben Smida, K. A. Morris, J. C. Clifton, A. Lawrenson

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

Linearizing power amplifiers (PA) using digital pre-distortion (DPD) results in the use of a pre-distorted driving input signal that exhibits higher peak-to-average power ratio (PAPR). This results in a decrease in the PA efficiency which is dependent on the level of output power back-off required. This work proposes a new linearization architecture based on a new 'post-distortion' method for power amplifier (PA) nonlinearity compensation. The proposed architecture allows for PA linearization with optimal input signal drive level to avoid efficiency degradation. A pseudomorphic high electron-mobility transistor (pHEMT) dual input PA architecture is also introduced and shown to be suitable for the proposed linearization approach. In comparison to classic pre-distortion techniques, the proposed post-distortion improves the output power by 2 dB and the drain efficiency by 9% in the presence of a 20MHz LTE up-link signal.

Original language	English
Title of host publication	2014 IEEE MTT-S International Microwave Symposium (IMS2014)
Publisher	IEEE
ISBN (Electronic)	9781479938698
DOIs	https://doi.org/10.1109/MWSYM.2014.6848428
Publication status	Published - 10 Jul 2014

Keywords

LTE
post-distortion
power amplifier
Pre-distortion
stacked architecture

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10.1109/MWSYM.2014.6848428

http://www.scopus.com/inward/record.url?scp=84904961954&partnerID=8YFLogxK

Cite this

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title = "Advanced GaAs power amplifier architecture linearized with a post-distortion method",

abstract = "Linearizing power amplifiers (PA) using digital pre-distortion (DPD) results in the use of a pre-distorted driving input signal that exhibits higher peak-to-average power ratio (PAPR). This results in a decrease in the PA efficiency which is dependent on the level of output power back-off required. This work proposes a new linearization architecture based on a new 'post-distortion' method for power amplifier (PA) nonlinearity compensation. The proposed architecture allows for PA linearization with optimal input signal drive level to avoid efficiency degradation. A pseudomorphic high electron-mobility transistor (pHEMT) dual input PA architecture is also introduced and shown to be suitable for the proposed linearization approach. In comparison to classic pre-distortion techniques, the proposed post-distortion improves the output power by 2 dB and the drain efficiency by 9\% in the presence of a 20MHz LTE up-link signal.",

keywords = "LTE, post-distortion, power amplifier, Pre-distortion, stacked architecture",

author = "\{Ben Smida\}, S. and Morris, \{K. A.\} and Clifton, \{J. C.\} and A. Lawrenson",

year = "2014",

month = jul,

day = "10",

doi = "10.1109/MWSYM.2014.6848428",

language = "English",

booktitle = "2014 IEEE MTT-S International Microwave Symposium (IMS2014)",

publisher = "IEEE",

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T1 - Advanced GaAs power amplifier architecture linearized with a post-distortion method

AU - Ben Smida, S.

AU - Morris, K. A.

AU - Clifton, J. C.

AU - Lawrenson, A.

PY - 2014/7/10

Y1 - 2014/7/10

N2 - Linearizing power amplifiers (PA) using digital pre-distortion (DPD) results in the use of a pre-distorted driving input signal that exhibits higher peak-to-average power ratio (PAPR). This results in a decrease in the PA efficiency which is dependent on the level of output power back-off required. This work proposes a new linearization architecture based on a new 'post-distortion' method for power amplifier (PA) nonlinearity compensation. The proposed architecture allows for PA linearization with optimal input signal drive level to avoid efficiency degradation. A pseudomorphic high electron-mobility transistor (pHEMT) dual input PA architecture is also introduced and shown to be suitable for the proposed linearization approach. In comparison to classic pre-distortion techniques, the proposed post-distortion improves the output power by 2 dB and the drain efficiency by 9% in the presence of a 20MHz LTE up-link signal.

AB - Linearizing power amplifiers (PA) using digital pre-distortion (DPD) results in the use of a pre-distorted driving input signal that exhibits higher peak-to-average power ratio (PAPR). This results in a decrease in the PA efficiency which is dependent on the level of output power back-off required. This work proposes a new linearization architecture based on a new 'post-distortion' method for power amplifier (PA) nonlinearity compensation. The proposed architecture allows for PA linearization with optimal input signal drive level to avoid efficiency degradation. A pseudomorphic high electron-mobility transistor (pHEMT) dual input PA architecture is also introduced and shown to be suitable for the proposed linearization approach. In comparison to classic pre-distortion techniques, the proposed post-distortion improves the output power by 2 dB and the drain efficiency by 9% in the presence of a 20MHz LTE up-link signal.

KW - LTE

KW - post-distortion

KW - power amplifier

KW - Pre-distortion

KW - stacked architecture

U2 - 10.1109/MWSYM.2014.6848428

DO - 10.1109/MWSYM.2014.6848428

M3 - Conference contribution

BT - 2014 IEEE MTT-S International Microwave Symposium (IMS2014)

PB - IEEE

ER -

Advanced GaAs power amplifier architecture linearized with a post-distortion method

Abstract

Keywords

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